SOURCE: Heater no longer works on auto fan, only manual fan
When you call for fan in auto ensure your getting 24 volts at pin on control board, if it is not energizing then there is a problem with the relay.. Before you change out the expensive control board, try the therm..
SOURCE: Lennox Gas Frunace fires goes out, fires goes out, fires goes out
furnace was working fine until the electricity went out for 5 hours now furnace is just humming and then nothing...HELP...
SOURCE: Furnace blower never blows.
it sounds more like the flame sensor ( a metal rod that is by the burners with a wire going to it and it has a ceramic base). you can try cleaning the rod and if that doesnt work they are not to expensive.
SOURCE: The blower on my lennox
Set the manual switch to off or the thermostat back to auto. and have the heat exchanger inspected by a heating company.
Please
have your furnace inspected annually by a qualified service technician.
Have them test the flue gases for proper combustion and carbon monoxide
production.
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